28 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



somite acute, curved forward ; lateral process of sixth thoracic somite 

 bilobed, anterior lobe rounded, posterior lobe acute, directed poster- 

 iorly; lateral process of seventh thoracic somite with anterior lobe 

 broader, less prominent than on the sixth ; abdominal carinae spined 

 as follows: submedian, (4) 5-6; intermediate, (2) 3-6; lateral, 1-6; 

 marginal, 1-5; telson with prelateral lobe; denticles 2-3, 8-10, 1; outer 

 submedian denticle the largest; 7-8 movable spines on outer margin of 

 penultimate segment of uropodal outer branch. 



Discussion: Until Holthuis' description of S. lijdingi in 1959, ma- 

 terial of this species was placed in S. brasiliensis by several workers, 

 including myself. Holthuis pointed out the differences between the two 

 species. S. brasiliejisis has not yet been reported north of Cabo Frio, 

 Brazil, while S. lijdingi is now known from the area between French 

 Guiana and Trinidad. 



The Gulf of Mexico material reported as S. brasiliensis by Springer 

 and Bullis ( 1956) and Manning ( 1959) is an undescribed species. 



Retnarks: The present material extends the depth range of this species 

 from 55 meters (Holthuis, 1959) to 45/48 fms. It occurs as shallow as 

 3 fms on mud and shell bottom. 



One female, 46.9 mm, total length, from OREGON Sta. 2307 A -f 

 B, held a loosely cemented egg-mass between her third and fourth thoracic 

 appendages. The eggs were .25-.30 mm in diameter, and were in an 

 early stage of development. 



The color of this species is as follows : posterior margin of carapace, 

 last three thoracic, and first five abdominal somites lined posteriorly 

 with dark pigment; second abdominal somite with a median dorsal 

 rectangular black patch; telson with a dark circle on either side of an- 

 terior portion of crest, the inner portions of the circle darker than the 

 outer ; concentric rows of pits on telson darkly colored ; inner side of 

 last two segments of uropodal outer branch are dark, as is the distal 

 half of the uropodal inner branch; raptorial merus with a longitudinal 

 line of dark pigment on upper margin of outer face. 



Squilla obtusa Holthuis, 1959 

 Plate 7 



Squilla intermedia, Bigelow, 1902, p. 159; Manning, 1959, p. 19 



(part). 

 Squilla brasiliensis, Manning, 1959, p. 18 (part). 

 Squilla obtusa Holthuis, 1959, p. 186, text-figs. 76 h-j, pi. IX, figs. 3-4. 

 Previous records: 



